Select the grammatically correct sentence.

Correct option is A

The grammatically correct sentence is (a) The participants of the competition are waiting for their turn curiously.
In this sentence, the subject "participants" is plural, so it should be followed by the plural verb "are waiting."
Option (a) correctly uses the plural form "are," making it the grammatically correct choice.
The other options have subject-verb agreement errors:
· The participants of the competition has been waiting for their turn curiously. (Subject-verb agreement error: "has been" should be "have been").
· A participants of the competition is waiting for their turn curiously. (Subject-verb agreement error: "A participants" should be "The participants", “is” should be “are”).
· The participants of the competition is waiting for their turn curiously. (Subject-verb agreement error: "is waiting" should be "are waiting").